Question

select the trimester in which each event begins to occur.
can hear
can detect light
fat accumulates under the skin
heart starts beating
firm grasp develops
cells specialize
bones develop
placenta develops
trimester 1
trimester 2
trimester 3
trimester 1
trimester 2
trimester 3
trimester 1
trimester 2
trimester 3
trimester 1
trimester 2
trimester 3
trimester 1
trimester 2
trimester 3
trimester 1
trimester 2
trimester 3
trimester 1
trimester 2
trimester 3
trimester 1
trimester 2
trimester 3
trimester 1
trimester 2
trimester 3

Explanation:

Each event is matched to the trimester when fetal development first includes that milestone, based on standard human fetal development timelines:

1. Can hear: Fetal auditory structures develop enough to detect sound in the second trimester.
2. Can detect light: Fetal eyes and visual pathways mature to sense light in the second trimester.
3. Fat accumulates under the skin: Significant subcutaneous fat buildup starts in the third trimester.
4. Heart starts beating: The embryonic heart begins beating early in the first trimester.
5. Firm grasp develops: Refined grasping ability develops in the third trimester as motor skills mature.
6. Cells specialize: Cell differentiation (specialization) is the key process of early embryonic development in the first trimester.
7. Bones develop: Ossification (bone formation) initiates in the first trimester.
8. Placenta develops: The placenta forms and matures during the first trimester to support the embryo.

Answer:

• Can hear: Trimester 2
• Can detect light: Trimester 2
• Fat accumulates under the skin: Trimester 3
• Heart starts beating: Trimester 1
• Firm grasp develops: Trimester 3
• Cells specialize: Trimester 1
• Bones develop: Trimester 1
• Placenta develops: Trimester 1